CBS: The annual "State of the Climate" report released Thursday said 2014 was the warmest year on record going back 135 years.
Temperatures continued to rise, and glaciers kept shrinking.
The impact has been dramatic in Greenland, the huge ice-covered island between the North Atlantic and Arctic oceans.
Reporter's Notebook: 72 Hours in Greenland
Almost 8 years ago to the day in 2007, it was 35 degrees below zero on top of Greenland's vast ice sheet. Strong winds and blowing snow were more...